Rotary valve



Oct.' 14 1924. 1,511,402

G. l. DES CHAMPS ROTARY VALVE Filed April 17, 1920 2 Sheets-Sheet 1 a ./W 6 W 2' /6 a Oct'. 14 1924. 1,511,402

G. l. DES CHAMPS ROTARY VALVE geoyefes'am mNvENTOR A'rrbRNEY WITNESS:

v 1579-6 Zig-64 25 @97 I i l i" Vf/- 45 l //6 4 Patented @et i4, 1924.

UNITED STATES 1,511,462 PATENT OFFICE.

GEORGE I. .DES CHAI/LBS. OF LEWISTON, IDAHO.

ROTARY VALVE.

Application filed April 17, 1920. Serial No. 374,654.

. and useful Improvements in Rotary Valves,

of which the following is a specification.

This invention relates to improvements in valves especially designed for internal combustion engines and aims to provide a rotary valve for controlling both the intake and exhaust ports of the engine.

Another ob]l ect of the invention is the provision of a novel arrangement of valve packing, to prevent leakage around the ports and thus increase the efhciency of the engine.

Another object is the provision of a valve of this character which is exceedingly simu ple in construction and operation and by means of which the power of the engine will be materially increased and a smooth, even and quiet operation assured.

Other objects and advantages of the invention will appear as thefollowing descrip tion is read in connection with the accompanying drawings.

In the drawings Figure 1 is a fragmentary section through the upper end of the cylinder of an engine with the valve applied thereto, the latter being in position to admit a charge of fuel to the cylinder.

Figure 2 is a. section taken longitudinally of the cylinder and transversely of the valve with the ports in the position shown in Figure 1.

Figure 3 is a view similar to Figure 1 with the valve in position for the escape of the exhaust gases.

Figure 4t is a view similar to Figure 2 with the portsin the position shown in Figure 3.

Figure 5 is a detailed view looking. at the end of the valve casing with the end plate removed.

Figure 6 is an inner face view of the end plate for closing the end of the casing shown in Figure 5.

Figure 7 is a section on the line 7-7 of Figure 5.

Figure 8 is a view looking at the opposite end of the valve casing from that shown in Figure 5.

Figure 9 is an inner face view of the end plate for closing the end of the cylinder shown in Figure 8.

Figure 10 is a diametric view showing the relative diameters of the bore of the casing and the casing packing plate.

Figure 11 is a view showing the relative diameters of the outer periphery of the ro4 tary valve member and a packing plate for said member.

Figure 12 is a detailed elevation of the rotary valve member with its packing plate in position.

Referring to the drawings in detail, wherein like characters of reference denote corresponding parts, the reference character 15 indicates a cylinder of an internal combustion engine which has formed therewith 'f or connected thereto a casing 16 which is disposed transversely of the end of the cylinder and with which it communicates by means'of a port 17. `This casing is provided with spaced walls so as to form water circulating chambers 18 which communicate with chambersof the water jacket of the engine. The casing 16 provides a casing for the rotary valve member 197 the latter being of hollow formation and divided longitudinally by means of a partition 20. The valve member 19 has extending from each end thereof a short shaft 21 and these shafts have bearings in opposite end plates 22 and 23. Both of these end plates are provided with water chambers 24 which communicate with the chambers 18 through openings 25 sc that a system of water circulation is provided which acts to maintain a proper degree of temperature for the proper operation of the valve. interposed between the end plates 23 and the adjacent ends of the valve member 19 are packing rings 26 and gaskets 2?, while a gasket 28 is provided between the end plates and shoulders formed within the casing 16. The end plate 23 is spaced from the end of the casing 16 and this end is closed by a plate 28 so as to providea housing for a gear 29 which is carried by one of the short shafts 21 of the valve member 19 and a gear 30 operated through a suitable connection with the crank shaft of the engine. The lower wall of the valve casing beneath the gear 29 is formed as shown at 31 to provide an oil chamber into which the periphery of the gear 29 extends so as to provide proper lubrication to the gears 29 and 30.

The valve member 19 is provided upon opposite sides of the partition 2O with ports 32 and 33. These ports are adapted to be brought into register with a port 17, the port 32 providing an intake port while the port 33 provides an erthaust port, so that the space upon opposite sides of the partition 2O within the valve member 19 is divided into an intake chamber 34and an exhaust cham.- ber 35. The intake chamber 34 is also'provided with a port 36 which is in a line with the vport 32 and is adapted to register with a port 37 in the intake `manifold 38 ofthe engine when the ports 32 and 17 register. The ends of the intake chamber 34 are closed, while one end of the exhaust chamber 35 is open to provide a port 39, so that communication may be established Vbetween the exhaust chamber Aand an vexhaust `manifold 40.

rThe ports 32, 33, 17, 36 and 37 are'provided with a packing rof novel formation which prevents leakage of the gases and insures a proper oper-ation of the engine. For this purpose the bore of the valve casing 16 is cut away as shown at 41 for the reception of'a packing plate 42 which is'of segmental `cross sectional shape, the diameter of its 'inner face being 'greater than the diameter of the bore of the valve casing. This plate 42 Iis provided with openings 43 whose area is slightly greater than the areaof the ports 17 and 37 which they are adapted'fto surround. The ports 17 and 37 are provided with flanges 44 which surround these ports and extend within the bore of the valve casing and enter the openings 43 in the plate 42 and are vflushed with the inner face of this plate. y

The rotary valve member 19 is :also 'cut jaway as shown at 45 for the reception of a segmental packing plate 46, the outer diameter of which is less than the outer periphery of the rotary valve member 19. Likethe plate 42 it is provided with openings 46 which 'surround the ports 32, 33 Vand 36 andv receive flanges 47 which surround the said' ports. The plates 42 and 46`are formed of resilient metal and have their greatest thickness along their longitudinal center so as to increase the strength 'of the plates at this point to overcome the weakening effect of the openings provided in the plates. The opposite side edges ofthe plates 42v and 46 'are curved and inclined with respect to the length of the casing and valve membenyso thatl the edges of these plates will meet with a shearing action yduring the rotation of the valve member and prevent any possibility of the, jedge of 'the plates catching upon one another. It will be aplparent thaty the relative diameters ofthe plates,the casing bore and the valve mem- 'details of construction Aand the rig'lit is herein reserved to make suoli ehanges as properly fall within 'the scope of the appended claim.

Having described tlie invention what is claimed is:- n

A rotary valve for internal combustion engines, comprising a horizontal casing having a cylindrical bore and provided with intake and 4exhaust p'orts, said casing having lwater chambers in communication with the water jacket of said engine, and having a port in communication with the cylinder of lsaid, engine, spacedfplates secured tothe inner walls of said casing, having water chambers formed therein in communidation with the water chambers in said casing, and provided with aligned openings, la hollow rotary valve member located in said ,casing spaced from one of 'said plates, having aupolrtgin one end adaptedv to communicate 'with the exhaust port of said casingv and provided with a port in one side thereof adapted to 'communicate with ithe intake port'of 'said casing, relatively y short .shafts extending from opposite endscf saidvalve member and journalled in the openingsi'n said plates.

a partition disposed longitudinally in saidk valve member between said port, said valve member having ports upon opposite sides of said partition adapted to communicate with the cylinders of said engine, a plate secured to one `end of said casing, a gear carriedby one of said shafts, between the last mentioned plate and l'one 'of tlie first A'mentiened plates, and a gear with the :gear

aforesaid for the purpose specified. w l

In testimony whereof I 'affix my signature.

1 GEORGE r. 

